Hello, I need some help with this. I'm using Windows 8.1 RTM. The latest Intel package (18.5) won't install if I don't upgrade the 12.6 driver that comes with Windows. If I do, (12.7 - Windows Update) the installer runs but it keeps the old driver. Thanks.

I realized that the Windows Update driver (12.7) is the same as the included in the latest Intel package, but you cannot complete the installation (with PROSet and other stuff) if you use the "box" driver (12.6). Thank you for replying.

You are right. The new software package does add support for Windows 8.1. Unfortunately, your adapter is an older design that will not be supported with software and driver updates. The driver included with Windows 8.1 is both the first and the last driver for that adapter for Windows 8.1.